Antifriction-bearing.



No. 733,348. PATENTED JULY 7, 1903. G. N. TOMS.

ANTIPRIGTION BEARING.

APPLICATION rum) JAN. 22. 1903.

' no MODEL.

lhvenlor: George N Toms, y kuww UNITED STATES Patented July '7, 1903.

Parent? Orricn.

GEORGE N. TOMS, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE FRIC- TIONLESS ROLLER BEARING COMPANY, OF bOSTON, MASSACHUSETTS,

A CORPORATION OF MAINE.

SPECIFICATION forming part of Letters Patent No. 733,348, dated July '7, 1903.

Application filed January 22, 1903.

To all, w/wm it inrty concern.-

Be itknown that I, GEORGE N. TOMS, a citizen of theUnited States of America, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Antifriction- Bearings, of which the following is a specification.

This invention relates to antifrictionhearings generally, and more particularly to that class of bea rings known as roller-bearings.

An object of the present invention is to furnish a roller-bearing of improved, simplified, and efficient construction and organization whereby the rollers will revolve upon their bearing-surfaces without the slip which is customary in roller bearings now in use, thereby reducing the friction between the bearing-surfaces to a minimum.

With this objects in view the invention consists of certain details of construction and arrangement of parts, which will be readily understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings, Figure 1 represents an elevation of a roller-bearing embodying this invention. Fig. 2 represents a sectional plan of the same, the cutting plane being on line 2 2 on Fig. 1. Fig. 3 represents a vertical section of the same, the cutting plane being on line 3 3 on Fig. 2.

Similar characters refer to like parts in all the figures of the drawings.

As a preamble to the detailed description of this improved bearing, it is desired to state that by the term shaft as employed herein is meant any suitable centrally disposed member-such as a shaft, spindle, axle, or journal of any kindwhether the same is stationary or rotative, and by the term casing as herein employed is meant any suitable housing member disposed about said central member, which will be rotative if the central member is stationary and will be stationary if the central member is rotative.

In the preferred construction and organization thereof shown in the accompanying drawings the antifriction-bearing comprises a central supporting member or shaft 10, an external housing member or casing 11, which Serial No. 140,131. (No model.)

- may be rotative or stationary, according to whether the shaft is stationary or rotative. The shaft 10 preferably is provided with an enlarged sleeve 12, which is preferably secured thereto by a suitable key 13, as shown in the drawings. The sleeve 12 is provided with an annular groove 11, on either side of which is a hearing-surface l5. interposed between said sleeve 12 and the casing 11 are aseries of rollers 16, having hearings in separating-rings 17 and provided with two reduced portions lb, which coact with the bearing-surfaces 15 upon the sleeve 12, the main portion 16 of said rollers projecting into the annular-groove 11 in the sleeve 12 without contacting with the bottom thereof. The inner periphery-of the casing 11 is provided with an annular groove 19, the bottom of which forms a bearing-surface for the main portion of the rollers 16.

In order to facilitate the assembling of the various parts of the bearing, the casing 11 is made in two parts, one of which, 20, is secured to the body portion 11 by suitable securingscrews 21. The outer faces of the casing 11 and the part 20 are provided with an annular projection 22, which projects beyond the separating-rings 17 and to which are fitted the dust-caps 23, which cover the ends of the rollers and the separating-rings 17 and are each provided at a point near the shaft 10 with an annular lip 2i, projecting into a depression 25 in the face of the said sleeve 12. The rollers 16 are provided with trunnions 26, which have bearings in the separating-rings 17, although it is obvious that the reduced portions 18 could be provided with hearings in said separating-rings equally as well, if desired.

It will be seen from the foregoing that the cylindrical surface of the reduced portions 18 coact with the bearing-surfaces 15 upon the sleeve 12, while the cylindrical surface of the enlarged portion 16 of the rollers coacts with the casing 11. This in itself would make a very efficient roller-bearing; but it has been found that the most efficient hearing would be secured when the rollers were constructed so that the larger diameter 16 would be made of the same relative proportion to the diameter of its bearing-surface on the casing 11 that the diameter of reduced portions 18 are tothe diameter of their bearingsurfaces on the sleeve 12that is to say, the enlarged portion 16 in making one complete revolution would travel through the same angle on said casing 11 that the reduced portions 18 are traveling through about said sleeve 12 in making a complete revolution. In other words, the enlarged portion 16 would be of such a diameter relative to the diameter of its bearing-surface and the diameter of the reduced portions 18 would be of the same relative proportion to the diameter of their bearing-surfaces that each of these sections of the rollers 16 18 would make a complete revolution on their hearing surfaces simultaneously without any slipping thereon taking place.

As will be obvious to all skilled in this art from an inspection of the drawings and from the foregoing description, the caps 23 are, by means of the annular lips on their inner face, so interlocked with the casing and the shaftsleeve 12 as not only to exclude dust, but also to retain the separating-rings 17, and thereby the rollers, in operative relation to the other parts of the structure.

Having thus described my invention, I claim 1. The combination with a roller-bearing of a cap member formed with a plurality of inwardlyextending annular lips by which said cap member is so interlocked with the parts of said roller-bearing as to hold said parts in operative relation and to exclude dust.

2. The combination with a bearing, of a cap member formed with a plurality of inwardly-extending annular lips by which said cap member is so interlocked with the parts of said bearing as to hold said parts in operative relation and to exclude dust.

Signed by me at Boston, Massachusetts,this 15th day of January, 1903.

GEORGE N. TOMS.

Witnesses:

WALTER E. LOMBARD, EDNA C. CLEVELAND. 

